This is from Dr Larry Mellick Youtube channel. I highlight this video to demonstrate a couple of things.
1. Good demonstration of CMAC VL in trauma patient with cervical spine precautions
2. Leaving cervical spine collar insitu during intubation attempt. Not my recommendation but you can see it is possible when using an indirect VL like CMAC. Larry actually advises taking collar off during the video but the intubator manages to get the tube in without doing that. If possible raised ICP, probably good idea to remove cervical collar anyway